Battery with soaking plate for thermally and electrically conductive channel, and cap assembly thereof

ABSTRACT

A battery with a soaking plate for a thermally and electrically conductive channel includes a plurality of battery rolls and two cap assemblies. Each of the battery rolls includes a central member and at least one electrode piece. Each of two ends of the central member has a bending portion. The electrode piece at least includes a positive electrode layer and a negative electrode layer. The electrode piece is winding around the central member. The battery rolls are disposed in parallel, and the bending portions at the two ends are formed as terminal disposed portions. The two cap assemblies are disposed at the terminal disposed portions.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of Taiwan applicationserial no. 99128281, filed on Aug. 24, 2010. The entirety of theabove-mentioned patent application is hereby incorporated by referenceherein and made a part of specification.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The disclosure is related to a battery, and in particular to a batterywith a soaking plate for a thermally and electrically conductivechannel.

2. Description of Related Art

Batteries are installed in various products on the market, from highlydemanded portable electronic products to cars and motorcycles used fortransportation. A goal constantly pursued by those in the industry ishow to reduce battery manufacturing costs and provide consumers withsafe and high quality batteries.

Lithium batteries are widely used due to their high power (output) andhigh energy density. Generally, a lithium battery includes a roll formedby a positive electrode layer, an insulation layer, and a negativeelectrode layer. The insulation layer prevents the positive electrodelayer and the negative electrode layer from directly contacting eachother. The roll is housed in a battery container by way of stacking orwinding, and after the battery container is filled with an electrolytesolution, the battery container is sealed. After the battery completes aformation step, it may be used as a battery.

When a lithium battery discharges, every spot in the roll releases heat,and since the insulation layer between the positive electrode layer andthe negative electrode layer and between multiple stacks or winding ofrolls is a heat insulator, it is difficult for heat inside the batteryto be dissipated, and heat accumulates in large quantities in the rolls.Moreover, since substrates of the positive electrode layer and thenegative electrode layer are electrically conductive materials, heatinside the battery is conducted through the positive electrode layer andthe negative electrode layer and accumulates at a roll currentconvergence point. In general, in order to channel currents out from thebattery and make the battery container easy to be sealed, the rollcurrent convergence point is usually disposed in the center of thebattery. A great amount of heat hence accumulates at the center of thebattery, causing an uneven distribution of temperature in the battery.The result is that internal temperatures of the battery continue torise, meaning that a chance of thermal runaway increases. Once thermalrunaway occurs in the battery, an eventual result may be explosion ofthe battery.

In the prior art related to heat dissipation of batteries, a heatguiding layer or heat dissipation fins are mainly disposed on an outerbattery shell to dissipate heat away from the battery. However, even ifheat outside the battery shell is removed, the uneven temperaturedistribution inside the battery cannot be prevented, nor can heataccumulation at the roll current convergence point be avoided.

SUMMARY OF THE INVENTION

The disclosure provides a battery and a cap assembly thereof, which arecapable of enhancing coupling reliability between electrode terminalsand convergence members and preventing problems of battery over-heating.

The disclosure provides a battery with a soaking plate behaved athermally and electrically conductive channel. The battery includes aplurality of battery rolls and two cap assemblies. Each of the batteryrolls includes a central member and at least one electrode piece. Eachof two ends of the central member includes a bending portion. Theelectrode piece at least includes a positive electrode layer and anegative electrode layer. The electrode piece winds around the centralmember, wherein the battery rolls are disposed in parallel, and bendingportions at the two ends form terminal disposed portions. The two capassemblies are respectively disposed on the terminal disposed portions.The central member is used as a thermally and electrically conductivechannel. Heat and electricity are both guided towards the central memberthrough a coated metal substrate and further guided towards the terminalportions of the battery.

The disclosure provides a cap assembly of a battery which includes aroll combination member, a terminal combination member, an electrodeterminal, a strength reinforcing block, a cap, and a pad assembly. Theroll combination member includes at least one opening, so that theterminal disposed portions of the rolls are capable of passing throughthe opening, wherein the terminal disposed portions are formed by thebending portions at two ends of the central member of each of the rolls.The terminal combination member, the electrode terminal, the strengthreinforcing block, the cap, and the pad assembly are sequentiallycombined on the roll combination member, wherein the electrode terminalincludes an electrically conductive portion and a thermally conductiveportion which surrounds the electrically conductive portion.

In the cap assembly of the battery of the disclosure, the rollcombination member has an opening which allows terminal disposedportions to pass through and combines a plurality of rolls. The terminaldisposed portions are, for example, formed by the bending portions attwo ends of the central member of each of the rolls. The electrodeterminal is connected to the bending portions, and the electrodeterminal is formed by the electrically conductive portion and thethermally conductive portion which surrounds the electrically conductiveportion. Inside the battery, electricity and heat are conducted throughthe same path, but by utilizing the electrode terminal, the electricallyconductive path and the thermally conductive path are separated. Athermally conductive portion is connected to the heat dissipation deviceoutside the battery, so that heat inside the battery is able to be drawnout rapidly, thereby reducing temperature differences between eachbattery in a battery pack and lowering a chance of thermal runaway.

In order to make the aforementioned and other objects, features andadvantages of the disclosure comprehensible, embodiments accompaniedwith figures are described in detail below.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the disclosure, and are incorporated in and constitutea part of this specification. The drawings illustrate embodiments of thedisclosure and, together with the description, serve to explain theprinciples of the disclosure.

FIG. 1A is a schematic diagram illustrating a central member of abattery roll according to an embodiment of the disclosure.

FIG. 1B is a schematic cross-section diagram illustrating a centralmember according to an embodiment of the disclosure.

FIG. 1C is a schematic cross-section diagram illustrating a centralmember according to another embodiment of the disclosure.

FIG. 1D is a schematic diagram illustrating a central member of abattery roll according to another embodiment of the disclosure.

FIG. 2 is a schematic diagram illustrating a battery roll according toan embodiment of the disclosure.

FIG. 3 is a schematic diagram illustrating a cap assembly according toan embodiment of the disclosure.

FIG. 4 is a schematic diagram illustrating a battery according to anembodiment of the disclosure.

FIGS. 5A and 5B are each a schematic partial diagram illustrating astructure of a battery according to an embodiment of the disclosure.

DESCRIPTION OF EMBODIMENTS

The disclosure provides a battery which includes a central member andcap assemblies.

The central member is, for example, disposed in a roll. The centralmember includes, for example, a main portion, electrode convergencemembers, and connection members. The main portion of the central memberis formed by a highly thermally conductive material, the connectionmembers are formed by a highly thermally conductive and electricallyinsulative material, and the electrode convergence members are formed byan electrically conductive material. The whole central member is hencecapable of conducting heat rapidly, so that heat is evenly distributedinside the battery, thereby preventing heat from accumulating at a rollcurrent convergence point. Through a heat dissipation device outside thebattery, heat inside the battery is able to be drawn out rapidly.Additionally, bending portions may be disposed at two ends of thecentral member. The bending portions are used as terminal connectionportions and are also able to act as heat dissipation fins.

Each of the cap assemblies are formed, for example, by a rollcombination member, a terminal combination member, an electrodeterminal, a strength reinforcing block, a cap, and a pad assembly. Theroll combination member has an opening which allows terminal disposedportions to pass through and combines a plurality of rolls. The terminaldisposed portions are, for example, formed by the bending portions attwo ends of the central member of each of the rolls. The electrodeterminal is connected to the bending portions, and the electrodeterminal is formed, for example, by an electrically conductive portionand a thermally conductive portion which surrounds the electricallyconductive portion. Inside the battery, electricity and heat areconducted through the same path, but by utilizing the electrodeterminal, the electrically conductive path and the thermally conductivepath are separated. A thermally conductive portion is connected to theheat dissipation device outside the battery, so that heat inside thebattery is able to be drawn out rapidly, thereby reducing temperaturedifferences between each battery in a battery pack and lowering a chanceof thermal runaway.

FIG. 1A is a schematic diagram illustrating a central member of abattery roll according to an embodiment of the disclosure. FIG. 1B is aschematic cross-section diagram illustrating a central member accordingto an embodiment of the disclosure. FIG. 1C is a schematic cross-sectiondiagram illustrating a central member according to another embodiment ofthe disclosure. FIGS. 1B and 1C are schematic cross-section diagramstaken along a line A-A′ in FIG. 1A. In FIGS. 1A, 1B, and 1C, arectangular central member is used as an example.

Referring to FIG. 1A, a central member 100 of a battery roll includes,for example, a main portion 102, connection members 104 and 106, andelectrode convergence members 108 and 110.

The main portion 102 is formed by a highly thermally conductivematerial, wherein a thermal conductivity of the highly thermallyconductive material is larger than 10 W/mK. A material of the mainportion 102 may also be an electrically conductive material or anelectrically insulative material. A material of the main portion isselected from a group consisting of a metal material and a compositematerial (such as a carbon fiber composite material, a polymericelectrically insulative and thermally conductive composite material).Flanges 102 a and 102 b are, for example, disposed at two ends of themain portion 102. According to an embodiment of the disclosure, as shownin FIG. 1B, a plurality of openings 102 c are disposed in the main body102 and are filled with a heat-adsorbing material. According to anotherembodiment of the disclosure, as shown in FIG. 1C, a plurality of poresare disposed in the main body 102, and the main body 102 is filled witha heat-adsorbing material.

The connection members 104 and 106 are formed by a highly thermallyconductive and electrically insulative material, so as to separate apositive and a negative electrode to prevent short circuits. A thermalconductivity of the highly thermally conductive and electricallyinsulative material is larger than 10 W/mK. A material of the connectionmembers 104 and 106 is polyolefin, which is a highly thermallyconductive and electrically insulative plastic, and doped with oneselected from a group consisting of nanometer-scale carbon particles,metal powder, and carbon powder. The connection members 104 and 106 are,for example, disposed at the two ends of the main portion 102. Theconnection member 104 connects the electrode convergence member 108 andthe main portion 102, and the connection member 106 connects theelectrode convergence member 110 and the main portion 102. Connectiongrooves 104 a, 104 b, 106 a, and 106 b are respectively disposed on theconnection members 104 and 106.

The electrode convergence members 108 and 110 are formed by anelectrically conductive material, and are respectively used as apositive electrode convergence member and a negative electrodeconvergence member. A material of the electrode convergence members 108and 110 is selected from a group consisting of copper, aluminum, gold,nickel, and iron. The electrode convergence members 108 and 110 haveconnection portions 108 a and 110 a and bending portion 108 b and 110 b.The bending portions 108 b and 110 b are disposed perpendicular to theconnection portions 108 a and 110 a. Flanges 108 c and 110 c aredisposed on the connection portions 108 a and 110 a.

The flanges 108 c and 110 c of the electrode convergence members 108 and110 are connected to the connection grooves 104 a and 106 a via physicalmethods such as wilding, bonding, riveting, or latching. The flanges 102a and 102 b of the main portion 102 are connected to the connectiongrooves 104 b and 106 b via physical methods such as wilding, bonding,riveting, or latching.

The main portion 102 of the central member 100 in the disclosure isformed by a highly thermally conductive material, the connection members104 and 106 are formed by a highly thermally conductive and electricallyinsulative material, and the electrode convergence members 108 and 110are formed by an electrically conductive material. Therefore the wholecentral member 100 is able to conduct heat rapidly, so that heat isevenly distributed inside the battery, thereby preventing heat fromaccumulating at a roll current convergence point.

Although in the above embodiment, the rectangular central member is usedas an example, the central member of the disclosure has a shape that isable to change according to a shape and structure of the battery, sothat the central member may also be columnar.

Only one type of connection method is described in the above embodiment.What is important is that the connection member 104, the electrodeconvergence member 108, the main portion 102, the connection member 106,and the electrode convergence member 110 form a flat central roll piece(central member). This central roll piece (central member) providessupport during winding, so that an electrode piece is winding thereon toform a roll. This central roll piece (central member) may be a devicewhich is electrically conductive and thermally conductive.

FIG. 1D is a schematic diagram illustrating a central member of abattery roll according to another embodiment of the disclosure.

Referring to FIG. 1D, the central member of the disclosure may have onlyone connection member 106, and the electrode convergence member 108 andthe main portion 102 are integrally formed by a same electricallyconductive material.

The following describes a battery roll of the disclosure. FIG. 2 is aschematic diagram illustrating a battery roll according to an embodimentof the disclosure. In FIG. 2, the same reference numbers as those inFIG. 1A represent the same elements and are not repeatedly described.

According to FIG. 2, a battery roll 200 includes a central member 100and at least one electrode piece 202. A structure of the central member100 is shown in FIG. 1A.

The electrode piece 202 sequentially includes a positive electrode layer204, insulation layer 206, a negative electrode layer 208, and aninsulation layer 210. According to the present embodiment, the electrodepiece 202 is, for example, winding around the central member 100.

The positive electrode layer 204 is, for example, a metal foil such asan aluminum foil, a nickel foil, or a steel foil coated by an positiveelectrode active substance. The positive electrode active substanceincludes a lithium-transition metal oxide and phosphate. The positiveelectrode active substance is, for example, lithium cobalt oxide,lithium nickle cobalt manganese oxide, lithium manganese oxide andlithium iron phosphate. The negative electrode layer 208 is, forexample, a metal foil such as a copper foil, a nickel foil, or a steelfoil coated by a negative electrode active substance. The negativeelectrode active substance includes carbon, tin, silicon, lithiumtitanate or another compound. A positive electrode connection portion212 (blank portion) which is not coated by the positive electrode activesubstance is disposed on a side of the positive electrode layer 204. Thepositive electrode connection portion 212 is connected to theconvergence member 110. A negative electrode connection portion 214(blank portion) which is not coated by the negative electrode activelayer is disposed on a side of the negative electrode layer 208. Thenegative electrode connection portion 214 is connected to theconvergence member 108. The positive electrode connection portion 212and the negative electrode connection portion 214 (blank portions) formlayers of stacked regions, and the blank portions are directly welded orriveted in a multi-layered manner on metal portions (electrodeconvergence members) of the central member. Hence, the positiveelectrode layer 204 (such as an aluminum foil) and the negativeelectrode layer 208 (such as a copper foil) form heat dissipation fins,which are capable of collecting heat and electricity through the metalportions (electrode convergence members) of the central member andtransmitting the heat and electricity to terminal portions. The heat andelectricity are then drawn out by using the heat dissipation deviceoutside the battery. The central member is used as a thermally andelectrically conductive channel. Heat and electricity are both guidedtowards the central member through a coated metal substrate and furtherguided towards the terminal portions of the battery.

A material of the insulation layers 206 and 210 includes an organicpolymeric material (for example, a porous film of polyolefins such aspolyethylene or polypropylene) or an inorganic material (for example, aporous film such as ceramic non-woven fabric). The insulation layers 206and 210 may be single-layered structures or multi-layered structures.

In the battery roll 200, the central member 100 is inserted into arolling machine (not shown) and is covered by an insulation layer (notshown). The top of the rolling machine is rotated for at least oneround, so that the insulation layer fully covers the central member 100.The positive electrode layer 204 and the negative electrode layer 208are sequentially added between the insulation layer, and the centralmember 100 is rotated, so that the positive electrode layer 204, theinsulation layer 206, the negative electrode layer 208, and theinsulation layer 210 continue to wind around the central member 100 andform a battery roll 200. In addition, an electrolyte solution (such as alithium salt solution) is injected between the central member 100, thepositive electrode layer 204, and the negative electrode layer 208, soas to conduct electricity.

In the battery roll 200 according to the above embodiment, the electrodeconvergence members 108 and 110 are disposed at the two ends of thecentral member 100. A positive electrode connection portion 212 and anegative electrode connection portion 214 of the electrode piece 202are, for example, respectively welded to the electrode convergencemember 110 and the electrode convergence member 108, so as to form theso-called roll current convergence point. Since the whole central member100 is formed with the highly thermally conductive material, heat isable to be conducted rapidly. Therefore, heat accumulated inside thebattery is able to be dissipated through the central member 100. Byusing the central member 100, heat accumulation in the battery and thecurrent convergence point of the battery is removed, thereby reducingthe temperature difference between each battery in a battery pack andlowering the chance of thermal runaway.

FIG. 3 is a schematic diagram illustrating a cap assembly according toan embodiment of the disclosure. FIG. 4 is a schematic diagramillustrating a battery according to an embodiment of the disclosure.FIGS. 5A and 5B are schematic partial views of a battery according to anembodiment of the disclosure.

According to FIG. 3, the cap assembly of the battery of the disclosureis formed, for example, by a roll combination member 302, a terminalcombination member 304, an electrode terminal 306, a strengthreinforcing block 308, a cap 310, and a pad assembly 312.

The roll combination member 302 has at least one opening 302 a, so thatthe terminal disposed portions of the roll are able to pass through theopening 302 a. The terminal disposed portions are, for example, formedby the bending portions at the two ends of the central member of each ofthe rolls (as shown in FIG. 2).

The electrode terminal 306 includes an electrically conductive portion306 a and a thermally conductive portion 306 b which surrounds theelectrically conductive portion 306 a. A material of the electrodeterminal 306 is, for example, copper or aluminum. A material of thestrength reinforcing block 308 is, for example, stainless steel.

The pad assembly 312 is selected from a group consisting of electricallyinsulative pads 312 a and 312 c and an air-tight pad 312 b. A materialof the pad assembly 312 includes multiple layers of different polymericmaterials.

The terminal combination member 304, the electrode terminal 306, thestrength reinforcing block 308, the cap 310, and the pad assembly 312are sequentially combined on the roll combination member 302. Theterminal combination member 304 is, for example, fixed on the rollcombination member 302 through screws 316 a and 316 b. The pad assembly312, the cap 310, the strength reinforcing block 308, and the electrodeterminal 306 are, for example, fixed on the terminal combination member304 through screws 318 a and 318 b. The pad assembly 312, the cap 310,and the strength reinforcing block 308 are, for example, fixed on theelectrode terminal 306 through screws 320 a, 320 b, 320 c, and 320 d.

As shown in FIG. 4, the battery of the disclosure includes a pluralityof battery rolls 200, two cap assemblies 300, and an outer shell 400. Inthe present embodiment, four battery rolls 200 are exemplarily combined.According to actual needs or designs, other numbers of battery rolls 200may be combined.

The four battery rolls 200 are disposed in parallel, and two of thebattery rolls 200 constitute a set. The bending portions at the two endsare arranged opposite to each other. The bending portions form a planarregion which is used as the terminal disposed portion 402. In FIG. 5A,an area of the terminal disposed portion 402 (bending portion) is farlarger than a cross-sectional area of the central member, so that heatis effectively conducted in the central member and a terminal connectioninterface.

The two roll combination members 302 are used to combine the batteryrolls 200 at the two ends, and the bending portions (terminal disposedportions 402) of the battery rolls 200 pass through the opening 302 a onthe roll combination members.

Screws are then used to fix the terminal combination members 304 on theroll combination members 302. After the outer shell 400 covers thebattery rolls 200, a physical bonding method such as using screws orrivets or welding is used to combine a terminal assembly 404 whichincludes the electrode terminal, the strength reinforcing block, thecap, and the pad assembly to the roll combination members 304. In FIG.5B, an area of the electrode terminals includes an area of the terminaldisposed regions 402 (bending portions of the central member), so thatelectrical paths are evenly distributed within each of the rolls.

In the battery according to the above embodiment, the area of theelectrode terminals includes the area of the terminal disposed portions(bending portions of the central member), so that the electrical pathsare evenly distributed within each of the rolls. Moreover, the area ofthe terminal disposed portions 402 (bending portion) is far larger thanthe cross-sectional area of the central member, so that heat iseffectively conducted in the central member and the terminal connectioninterface, thereby reducing the temperature difference between each ofthe batteries in the battery pack and lowering the chance of thermalrunaway.

According to the embodiment, although rectangular batteries and columnarbatteries are exemplarily used, batteries of all sorts of shape may beused in accordance with the disclosure. Therefore, the shape of thecentral member may be changed according to the shape and structure ofthe batteries. Additionally, the shape of the cap assembly may bechanged according to the shape and structure of the batteries.

In summary, the central member of the disclosure is formed by a highlythermally conductive material, so that heat is conducted rapidly anduniformly. Therefore, by using the substrate (copper foil, aluminumfoil) coated with the active substance as electrically conductive andheat-collecting fins, heat accumulated in the battery is able to beconducted to the terminal portions along with electricity, and heatextraction or heat dissipation and electricity conduction processes maybe performed individually or simultaneously (through the thermally andelectrically conductive channel), thereby reducing the temperaturedifference between each of the batteries in the battery pack andlowering the chance of thermal runaway.

Moreover, since most of the heat generated inside the batteryaccumulates at the current convergence point (positive electrodeconvergence member and negative electrode convergence member) of each ofthe rolls, by designing the current convergence point of each of therolls to include the bending portions, which have an area far largerthan the cross-sectional area of the central member, heat is effectivelyconducted in the central member and the terminal connection interface.The area of the electrode terminals includes the area of the terminaldisposed portions (the bending portions of the central member), therebyreducing the temperature difference between each of the batteries in thebattery pack and lowering the chance of thermal runaway.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of thedisclosure without departing from the scope or spirit of the disclosure.In view of the foregoing, it is intended that the disclosure covermodifications and variations of this disclosure provided they fallwithin the scope of the following claims and their equivalents.

What is claimed is:
 1. A battery with a soaking plate for a thermallyand electrically conductive channel, comprising: a plurality of batteryrolls, each of the battery rolls comprising: a central member, each oftwo ends of the central member comprising a bending portion; and atleast one electrode piece, at least comprising a positive electrodelayer and a negative electrode layer, the electrode piece winding aroundor being stacked outside the central member, wherein each of the batteryrolls are disposed in parallel, and the bending portions at the two endsform a terminal disposed portion; and two cap assemblies, each disposedon the terminal disposed portion, wherein the central member is used asthe thermally and electrically conductive channel, and heat andelectricity are both guided towards the central member through a coatedmetal substrate and further guided towards a terminal portion of thebattery.
 2. The battery with the soaking plate for the thermally andelectrically conductive channel as claimed in claim 1, wherein each ofthe two cap assemblies comprises: a roll combination member, disposed ata end of the battery rolls, so as to combine the battery rolls, the rollcombination member comprises at least one opening thereon, and thebending portions are capable of passing through the opening; and aterminal combination member, an electrode terminal, a strengthreinforcing block, a cap, and a pad assembly, sequentially combined onthe roll combination member.
 3. The battery with the soaking plate forthe thermally and electrically conductive channel as claimed in claim 2,wherein the terminal combination member is fixed on the roll combinationmember by way of using screws, riveting, or welding.
 4. The battery withthe soaking plate for the thermally and electrically conductive channelas claimed in claim 2, wherein the pad assembly, the cap, the strengthreinforcing block, and the electrode terminal are fixed on the terminalcombination member by way of using screws, riveting, or welding.
 5. Thebattery with the soaking plate for the thermally and electricallyconductive channel as claimed in claim 2, wherein the pad assembly, thecap, and the strength reinforcing block are fixed on the electrodeterminal by way of using screws, riveting, or welding.
 6. The batterywith the soaking plate for the thermally and electrically conductivechannel as claimed in claim 2, wherein the pad assembly is selected froma group consisting of an electrically insulative pad and an air-tightpad, and a material of the pad assembly comprises multiple layers ofdifferent polymeric material.
 7. The battery with the soaking plate forthe thermally and electrically conductive channel as claimed in claim 2,wherein the electrode terminal comprises: an electrically conductiveportion; and a thermally conductive portion, surrounding theelectrically conductive portion.
 8. The battery with the soaking platefor the thermally and electrically conductive channel as claimed inclaim 1, wherein the central member comprises: a main portion,comprising a highly thermally conductive material; a first electrodeconvergence member and a second electrode convergence member, disposedat a first end and a second end of the main portion, the first end beingopposite to the second end; and a first connection member, formed by ahighly thermally conductive and electrically insulative material havinga thermal conductivity larger than 10 W/mK, the first connection memberbeing disposed between the main portion and the first electrodeconvergence member, so as to connect the main portion and the firstelectrode convergence member, wherein the bending portion is disposed onthe first electrode convergence member and the second electrodeconvergence member.
 9. The battery with the soaking plate for thethermally and electrically conductive channel as claimed in claim 8,wherein the second electrode convergence member and the main portion areformed by a same electrically conductive material, and the secondelectrode convergence member and the main portion are an integrallyformed unit.
 10. The battery with the soaking plate for the thermallyand electrically conductive channel as claimed in claim 9, wherein aconnection groove is disposed on the first connection member, and aflange is disposed on the first end of the main portion; the flangebeing fixed on the connection groove by way of using screws, riveting,welding, or latching.
 11. The battery with the soaking plate for thethermally and electrically conductive channel as claimed in claim 8,further comprising: a second connection member, formed by a highlythermally conductive and electrically insulative material having athermal conductivity larger than 10 W/mK, the second connection memberbeing disposed between the main portion and the second electrodeconvergence member, so as to connect the main portion and the secondelectrode convergence member.
 12. The battery with the soaking plate forthe thermally and electrically conductive channel in claim 11, wherein aconnection groove is disposed on each of the first connection member andthe second connection member, and a flange is disposed on each of thefirst end and the second end of the main portion; the flanges beingfixed on the connection grooves by way of using screws, riveting,welding, or latching.
 13. The battery with the soaking plate for thethermally and electrically conductive channel as claimed in claim 11,wherein a connection groove is disposed on each of the first connectionmember and the second connection member, and a flange is disposed oneach of the first electrode convergence member and the second electrodeconvergence member; the flanges being fixed on the connection grooves byway of using screws, riveting, welding, or latching.
 14. The batterywith the soaking plate for the thermally and electrically conductivechannel as claimed in claim 8, wherein the positive electrode layercomprises a plurality of positive electrode connection portions whichare connected to the first electrode convergence member; and thenegative electrode layer comprises a plurality of negative electrodeconnection portion which are connected to the second electrodeconvergence member.
 15. A cap assembly for a battery, comprising: a rollcombination member, comprising at least one opening, so that a terminaldisposed portion of a roll is capable of passing through the opening,wherein the terminal disposed portion is formed by a bending portion oftwo ends of a central member of the roll; and a terminal combinationmember, an electrode terminal, a strength reinforcing block, a cap, anda pad assembly, sequentially combined on the roll combination member,wherein the electrode terminal comprises an electrically conductiveportion and a thermally conductive portion which surrounds theelectrically conductive portion.
 16. The cap assembly for the battery asclaimed in claim 15, wherein the terminal combination member is fixed onthe roll combination member by way of using screws, riveting, orwelding.
 17. The cap assembly for the battery as claimed in claim 15,wherein the pad assembly, the cap, the strength reinforcing block, andthe electrode terminal are fixed on the terminal combination member byway of using screws, riveting, or welding.
 18. The cap assembly for thebattery as claimed in claim 15, wherein the pad assembly, the cap, andthe strength reinforcing block are fixed on the electrode terminal byway of using screws, riveting, or welding.
 19. The cap assembly for thebattery as claimed in claim 15, wherein the pad assembly is selectedfrom a group consisting of an electrically insulative pad and anair-tight pad.